A person who becomes dangerously overheated faces the danger of organ failure that can lead to death ( answer D ).
The body becomes overheated when its internal temperature rises above the normal range of 97 to 99 degrees Fahrenheit.
Heat stress affects many areas of the body, especially the heart and the kidneys. When the body overheats the heart pumps more blood to the surface of the skin, to assist with sweating to cool down the body. In extreme cases, this effort is too much for the heart and can cause a heat stroke, heart attack or a heart failure.
Prolonged exposure to heat reduces the blood flow to the kidneys by up to 30 percent. This decreases the amount of oxygen and nutrients that is delivered to the kidneys which can lead to kidney failure.